* Checks if query parser is available.
     * @return True if query parser is available, false otherwise.
     */
    public static boolean hasQueryParser() {
        return hasComponent(QUERY_PARSER);
    }

    /**
     * Checks if view helper is available.
     * @return True if view helper is available, false otherwise.
     */
    public static boolean hasViewHelper() {
        return hasComponent(VIEW_HELPER);

    /**
     * If file exists, supersede it. Otherwise create the file
     */
    public static final int FILE_SUPERSEDE = 0x0;
    /**
     * If file exists, open it. Otherwise fail
     */
    public static final int FILE_OPEN = 0x1;
    /**
     * If file exists, fail. Otherwise create the file
     */
    public static final int FILE_CREATE = 0x2;
    /**

	}

	// There are two possibilities:
	// - We use a KMS -> There must be non-empty key ID and a KMS data key.
	// - We use a K/V -> There must be no key ID and no KMS data key.
	// Otherwise, the caller has passed an invalid argument combination.
	if keyID == "" && len(kmsKey) != 0 {
		logger.CriticalIf(context.Background(), errors.New("The key ID must not be empty if a KMS data key is present"))
	}

     *
     * @return true if the item has been updated, false otherwise.
     */
    public boolean isUpdated() {
        return newInput != null;
    }

    /**
     * Checks if the item has been marked for deletion.
     *
     * @return true if the item is marked for deletion, false otherwise.
     */
    public boolean isDeleted() {
        return isUpdated() && newInput.length() == 0;

     *
     * @return true if the item has been updated, false otherwise.
     */
    public boolean isUpdated() {
        return newInput != null && newOutput != null;
    }

    /**
     * Checks if the item has been marked for deletion.
     *
     * @return true if the item is marked for deletion, false otherwise.
     */
    public boolean isDeleted() {

     * The result code of the DCERPC operation
     */
    protected int result = 0;

    /**
     * Checks if a specific flag is set
     * @param flag the flag to check
     * @return true if the flag is set, false otherwise
     */
    public boolean isFlagSet(final int flag) {
        return (flags & flag) == flag;
    }

    /**
     * Unsets a specific flag
     * @param flag the flag to unset
     */

     * @param text the string to check
     * @return true if empty or null, false otherwise
     */
    public static final boolean isEmpty(final String text) {
        return text == null || text.length() == 0;
    }

    /**
     * Checks if the string is not empty.
     *
     * @param text the string to check
     * @return true if not empty, false otherwise
     */
    public static final boolean isNotEmpty(final String text) {

   * used to determine the charset of the response bytes.
   *
   * Otherwise if the response has a `Content-Type` header that specifies a charset, that is used
   * to determine the charset of the response bytes.
   *
   * Otherwise the response bytes are decoded as UTF-8.
   */
  fun charStream(): Reader =
    reader ?: BomAwareReader(source(), charset()).also {

     * @return true if in background mode, false otherwise.
     */
    public boolean isBackground() {
        return background;
    }

    /**
     * Sets the background mode for the crawler.
     * If true, the execute method will not wait for termination.
     * @param background true to run in background, false otherwise.
     */
    public void setBackground(final boolean background) {

	}

	// There are two possibilities:
	// - We use a KMS -> There must be non-empty key ID and a KMS data key.
	// - We use a K/V -> There must be no key ID and no KMS data key.
	// Otherwise, the caller has passed an invalid argument combination.
	if keyID == "" && len(kmsKey) != 0 {
		logger.CriticalIf(context.Background(), errors.New("The key ID must not be empty if a KMS data key is present"))
	}